Pearl River Municipal STP
Pearl River, LA · St. Tammany County · Publicly Owned Treatment Works
- Average flow
- 0.14 MGD
- Design flow
- 0.33 MGD
- NPDES permit
- LA0075329
- Effective
- Permit expires
- July 2029
- Population served
- 2,230
- CWNS 2022
Pearl River Municipal STP is a publicly owned wastewater treatment works in Pearl River, St. Tammany County, Louisiana treating an average of 0.14 million gallons per day against a permitted design capacity of 0.33 MGD, serving about 2,230 residents. Treatment on site includes clarifiers. It discharges under NPDES permit LA0075329 (effective), which expires in July 2029, with 0 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Clarifiers
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Compliance snapshot (last 3 years)
- Total violations
- 0
- Effluent violations
- 0
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Pearl River Municipal STP.
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Nearby wastewater treatment plants in Louisiana
Slidell · 6 mi away
0.45 MGD
Slidell · 8 mi away
2.95 MGD
Mandeville · 16 mi away
0.48 MGD
Mandeville · 17 mi away
0.04 MGD
Mandeville · 18 mi away
0.03 MGD
Mandeville · 20 mi away
0.37 MGD
Covington · 21 mi away
0.12 MGD
Mandeville · 21 mi away
0.3 MGD
Pearl River Municipal STP: frequently asked questions
Sources and methodology
Flow, permit and violation figures come from the EPA's ICIS-NPDES discharge monitoring records. Population served comes from the Clean Watersheds Needs Survey 2022. Treatment structures are identified by Klarifi's review of aerial imagery, and capital improvement projects are extracted from published municipal budget documents. Violations are counted over the last three years of monitoring reports.
Data refreshed September 11, 2026; facility record last updated May 19, 2025.